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<?php
/**
* escpos-php, a Thermal receipt printer library, for use with
* ESC/POS compatible printers.
*
* Copyright (c) 2014-2015 Michael Billington <michael.billington@gmail.com>,
* incorporating modifications by:
* - Roni Saha <roni.cse@gmail.com>
* - Gergely Radics <gerifield@ustream.tv>
* - Warren Doyle <w.doyle@fuelled.co>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* This class renders text to small images on-the-fly. It attempts to mimic the
* behaviour of text output, whilst supporting any fonts & character encodings
* which your system can handle. This class currently requires Imagick.
*/
class ImagePrintBuffer implements PrintBuffer {
private $printer;
function __construct() {
if(!EscposImage::isImagickLoaded()) {
throw new Exception("ImagePrintBuffer requires the imagick extension");
}
}
function flush() {
if($this -> printer == null) {
throw new LogicException("Not attached to a printer.");
}
}
function getPrinter() {
return $this -> printer;
}
function setPrinter(Escpos $printer = null) {
$this -> printer = $printer;
}
function writeText($text) {
if($this -> printer == null) {
throw new LogicException("Not attached to a printer.");
}
if($text == null) {
return;
}
$text = trim($text, "\n");
/* Create Imagick objects */
$image = new Imagick();
$draw = new ImagickDraw();
$color = new ImagickPixel('#000000');
$background = new ImagickPixel('white');
/* Create annotation */
//$draw -> setFont('Arial');// (not necessary?)
$draw -> setFontSize(24); // Size 21 looks good for FONT B
$draw -> setFillColor($color);
$draw -> setStrokeAntialias(true);
$draw -> setTextAntialias(true);
$metrics = $image -> queryFontMetrics($draw, $text);
$draw -> annotation(0, $metrics['ascender'], $text);
/* Create image & draw annotation on it */
$image -> newImage($metrics['textWidth'], $metrics['textHeight'], $background);
$image -> setImageFormat('png');
$image -> drawImage($draw);
//$image -> writeImage("test.png");
/* Save image */
$escposImage = new EscposImage();
$escposImage -> readImageFromImagick($image);
$size = Escpos::IMG_DEFAULT;
$this -> printer -> bitImage($escposImage, $size);
}
function writeTextRaw($text) {
if($this -> printer == null) {
throw new LogicException("Not attached to a printer.");
}
$this -> printer -> getPrintConnector() -> write($data);
}
}